High data rate interconnecting device

• US 20040248468A1
• Filed: 02/23/2004
• Published: 12/09/2004
• Est. Priority Date: 08/23/2001
• Status: Active Grant

• Current Assignee: RiT Technologies Ltd.
• Original Assignee: RiT Technologies Ltd.
• Inventors: Gurovich, Dmitry, Haggay, Yaakov
• Granted Patent: US 7,315,224 B2
• Time in Patent Office: Days
• US Class Current: 439/620
• CPC Class Codes: H01R 13/6466 on substrates, e.g. printed circuit boards [PCB]
• CPC Class Codes: H01R 13/6474 by variation of conductive properties, e.g. by dimension variations
• CPC Class Codes: H01R 13/719 specially adapted for high frequency, e.g. with filters
• CPC Class Codes: H01R 2201/04 for network, e.g. LAN connectors
• CPC Class Codes: H05K 1/0228 Compensation of cross-talk by a mutually correlated lay-out of printed circuit traces, e.g. for compensation of cross-talk in mounted connectors balanced signal pairs H05K1/0245
• CPC Class Codes: H05K 2201/10053 Switch
• CPC Class Codes: H05K 2201/10189 Non-printed connector

Abstract

An interconnect apparatus for providing a communication path for data signals in a predetermined frequency band, that includes a first and a second sections of a transmission line, connected at one end to first and second data transceiving devices, respectively. A switch, such as a mechanical, electro-mechanical, electronic, electro-magnetic and electro-optical switch, having conductive/non-conductive states, is provided for connecting/disconnecting between the other ends of the first and the second sections, for providing a data communication path between the data transceiving devices while being in its conductive state a third and a fourth sections of a transmission line, each of which connected at one end to a contact of the switch and at the other end to a first and a second connector, respectively. A compensation circuitry is provided for compensating, within the frequency band, parasitic effects caused by the switch and/or cord, while the switch is in its conductive state or, while the switch is in its non-conductive state and while a connection between the first and the second connectors is provided by a cord having predetermined characteristics, such that the compensation circuitry compensates the influence of parasitic effects introduced along the communication path by the switch while being in its non-conductive state and while the cord is a part of the communication path or, by the combination of the third and a fourth sections and the connectors while the switch is in its conductive state.

Claims

1. Interconnect apparatus for providing a communication path for data signals in a predetermined frequency band, comprising:

One) a first and a second sections of a transmission line, connected at one end to first and second data transceiving devices, respectively;

Two) a switch, having conductive/non-conductive states, for connecting/disconnecting between the other ends of said first and said second sections, for providing a data communication path between said data transceiving devices while being in its conductive state;

Three) a third and a fourth sections of a transmission line, each of which connected at one end to a contact of said switch and at the other end to a first and a second connector, respectively; and

Four) a compensation circuitry for compensating, within said frequency band, parasitic effects caused by said switch and/or cord, while said switch being in its conductive state or, while said switch being in its non-conductive state, such that said compensation circuitry compensates the influence of parasitic effects introduced along said communication path by said switch while being in its non-conductive state and while a cord having predetermined characteristics is a part of said communication path or, by the combination of said third and a fourth sections and said connectors while said switch being in its conductive state.

2. Interconnect apparatus according to claim 1, in which the cord is connected between the connectors whenever the switch is in its non-conductive state.

3. Interconnect apparatus according to claim 1, in which the compensation circuitry is implemented by utilizing components selected from the following group:

lumped/semi-lumped elements having essentially reactive electrical properties;

continuous/non-continuous transmission line segments;

inter Digits;

4. Interconnect apparatus according to claim 1, in which the communication path includes transmission lines selected from the following group:

microstripline;

coplanar stripline;

suspended stripline;

paired lines; and

coaxial lines.

5. Interconnect apparatus according to claim 4, in which the transmission lines are implemented with, or without, ground planes.

6. Interconnect apparatus according to claim 1, in which the compensation circuitry compensates the effect of the following parasitic effects:

impedance mismatch along the path;

cross-talk between transmission lines or segments thereof;

imbalance of differential transmission lines.

7. Interconnect apparatus according to claim 1, in which compensation is carried out by dividing the transmission line into subsections and by including reactive elements/stubs placed at points along said transmission line, each of said subsections and/or reactive elements having spatial location and geometric properties which are predetermined according to the frequency range and/or the type of transmission line.

8. Interconnect apparatus according to claim 1, in which compensation is carried out by generating couplings between transmission lines, the spatial location and geometry of which is determined according to the frequency range and/or the type of transmission line, thereby generating destructive/constructive wave interference that essentially compensates unwanted wave interference.

9. Interconnect apparatus according to claim 1, in which the switch is selected from the following group of switches:

a mechanical switch;

an electromechanical switch;

an electronic switch;

an electro-magnetic switch;

electro-optical switch.

10. Interconnect apparatus according to claim 1, in which the compensation circuitry is implemented by utilizing a multi-layered PCB.

11. Interconnect apparatus according to claim 1, in which the data signals have maximum frequencies being equal to or higher than 250 MHz.

12. Interconnect apparatus according to claim 1, in which the length of each section is shorter than 0.25λ

, wherein λ

is the wavelength at the operating frequency within the frequency band.

13. Interconnect apparatus according to claim 7, in which the length of each stub is shorter than 0.125λ

, wherein λ

is the wavelength at the operating frequency within the frequency band.

14. Interconnect apparatus according to claim 7, in which the length of each subsection is shorter than 0.25λ

, wherein λ

is the wavelength at the operating frequency within the frequency band.

15. Interconnect apparatus according to claim 8, in which the distance between coupled transmission lines is shorter than 0.01λ

, wherein λ

is the wavelength at the operating frequency within the frequency band.

16. Interconnect apparatus according to claim 10, in which conductors of paired lines are implemented in different layers of the PCB, such that they essentially overlap.

17. Interconnect apparatus according to claim 1, in which the width of the conductor used to implement each section is narrower than 0.01λ

, wherein λ

is the wavelength at the operating frequency within the frequency band.

18. Interconnect apparatus according to claim 5, in which the width of the conductor used to implement each stub is narrower than 0.01λ

, wherein λ

is the wavelength at the operating frequency within the frequency band.

19. Interconnect apparatus according to claim 5, in which the width of the conductor used to implement each subsection is narrower than 0.01λ

, wherein λ

is the wavelength at the operating frequency within the frequency band.

20. Interconnect apparatus according to claim 3, in which the distance between compensating components along a transmission line is shorter than 0.25λ

, wherein λ

is the wavelength at the operating frequency within the frequency band.

21. Interconnect apparatus for providing a communication path for data signals in a predetermined frequency band, substantially as described and illustrated.